Custom Report : Additional column to calculate days since TICKET has been created

Custom Report : Additional column to calculate days since TICKET has been created

Hi, 

My installation as below. 
ServiceDesk Plus Standard 
Build number: 10513 

Db: PostgreSQL ver 10.5 

I'm wondering if anyone can help to create a report with additional column to show number of days since the TICKET has been created. 

Thanks.